代码清单11-2 设置pager adapter

package com.bignerdranch.android.criminallntent;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;

import java.util.List;

public class CrimePagerActivity extends AppCompatActivity {

    private ViewPager mViewPager;
    private ListmCrimes;

    @Override
    protected void onCreate(Bundle savedinstanceState){
        super.onCreate(savedinstanceState);
        setContentView(R.layout.activity_crime_pager);

        mViewPager=(ViewPager)findViewById(R.id.crime_view_pager);

        mCrimes=CrimeLab.get(this).getCrimes();
        FragmentManager fragmentManager=getSupportFragmentManager();
        mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

            @Override
            public Fragment getItem(int position) {
                Crime crime=mCrimes.get(position);
                return CrimeFragment.newInstance(crime.getId());
            }

            @Override
            public int getCount() {
                return mCrimes.size();
            }
        });
    }
}